[Y-TRY]

As I mentioned in another thread, I had a chance to really put my car to the test this weekend- hitting the burger stands and local spots and cruising around. There's a couple strange anomolies I want to see if you guys can help with. It's my first time dealing with turbos, but I know the function of an engine pretty well and have applied that into trying to diagnose what's going on:

Problem: The car seems to stay revved quite a while when letting off the gas. For example, if I'm on the freeway and let off the gas, put the car in neutral (5spd) and coast it down the exit ramp, it stays revved up to 2k or so and very slowly settles back to idle, and quite often even loads-up and dies at the light.

What I think is happening: At first I quipped "vaccum leak". What it really seems like is happening is that the turbos are still spinning right along, well after I let-off the gas. The wastegates would control max boost, and the BOV controls spikes. But there isn't anything to keep the turbos from continuing to spin after letting off, other than their natural decelleration. Point is- it sure seems like the turbos are still forcing air past the throttle blades when my foot is off the gas(because they are spinning disproportionately with the throttle). I don't know if the air is actually overpowering the throttle springs and opening the blades, or if it's just pushing through the partially closed gap (from idle setting). So it's acting like the throttle is sticking, when it's just the turbos keeping air pressure against the topside of the blades. As long as the air continues to flow past the boosters, they are continuing to add fuel. Eventually, the turbos slow, less air is forced through, and there's a moment where the car floods, killing it.

I plan on running through this situation, or mimicing it, without the hat on to test this hypothesis. It's really the only thing that makes sense, though. Can any of you guys confirm or deny this sort of problem, or how it may be resolved? Are my theories all wet?

Another problem: My wastegates aren't opening. (HKS Standard 40mm, external) All the lines are secure and they are getting good signal to both ports.

Suggestions: If I want the wastegates to open at 10psi, do I need 10psi springs in each one or 5psi springs in each one? I know that's a stretch but is it a possibility? Do vaccum lines work like hydraulic? ie- will the entire line show the same pressure regardless of how many times it has been T'd? Or does each port require a dedicated vacuum source?

I'm just throwing this stuff out there as possibilities but I'm still scratching my head. There aren't alot of blow-through carb/twin turbo old Camaros out there to steal info from. I figured that this is the best place to ask. What do you think?